How can I make CAPTCHA work across multiple pages?

Posted by jm04469 on Stack Overflow See other posts from Stack Overflow or by jm04469
Published on 2009-07-28T10:24:40Z Indexed on 2010/03/13 21:05 UTC
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security

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captcha

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authentication

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Ever visit a website such as myspace where they leverage CAPTCHA to prevent spam? The typical pattern is to present a challenge to each URL that is opened, yet the challenge doesn't actually belong to the page itself which causes additional bandwidth usage.

So, if I open up six pages at the same time and want to present a challenge on each page. I want the challenge to be tied to the page and not to the session. How can I make this work with Spring and/or Struts.

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